Bioelectricity: Passive and activve current flow along an axon
Computations about the propagaton of an action potential
Suppose that an unmyelinated fibre with a radius of \(0.11\,\text{μm}\) has a propagation speed of \(3\,\text{m}/\text{s}\).
Calculate what propagation speed a fiber of \(0.2\,\text{μm}\) and a fiber of \(0.44\,\text{μm}\) will have (assuming that all other properties are equal). Calculate the exact answer or do it with a calculator and round off to two decimal places.
How thick must the nerve fibres be (in \(\text{μm}\) ) so that a person of \(2\) meter height has a reaction time of muscles in the toes less than \(50\) ms? (Round off to one decimal place)
Calculate what propagation speed a fiber of \(0.2\,\text{μm}\) and a fiber of \(0.44\,\text{μm}\) will have (assuming that all other properties are equal). Calculate the exact answer or do it with a calculator and round off to two decimal places.
How thick must the nerve fibres be (in \(\text{μm}\) ) so that a person of \(2\) meter height has a reaction time of muscles in the toes less than \(50\) ms? (Round off to one decimal place)
| speed of a fibre with radius \(0.2\,\text{μm}=\;\) | \(\;\text{m}/\text{s}\) |
| speed of a fibre with radius \(0.44\,\text{μm}=\;\) | \(\;\text{m}/\text{s}\) |
| required radius of the nerve fibre = | \(\;\text{μm}\) |
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